Some clause structure about “SOURCE said that CLAUSE”?
Suppose we have the following sentences: >John believes that people are good. >Steve knows that France is in Europe. Now, in these sentences we have some clause (e.g. People are good, France is in Europe), and some "source" testifying about this clause (John, Steve) which give different degrees of certainty (belief, knowing). Is there some clause/sentential structure or syntactical pattern for this?